Haymarket businesses inside town limits need Town zoning approval before Prince William County issues plumbing permits, get water and sewer from Prince William Water, and use Columbia Gas of Virginia rather than Washington Gas. Call the number on this page to be connected with a local plumber in Haymarket.

How do permits work for a business in town?
Prince William County Development Services now issues all building permits for the Town of Haymarket, including plumbing and mechanical, but applicants first need Zoning Approval from the Town. That two-step process matters for tenant build-outs, new restaurant kitchens and water heater changes in the shops and offices along Route 55. Town Hall is 703-753-2600. A County gas permit covers gas piping and venting for gas water heaters, and a plumbing permit is added when water piping is extended more than 10 feet or the material changes.
Who supplies water and sewer?
The Town lists Prince William Water for both. Prince William Water's West System, which serves the western county, blends Potomac River water treated at Fairfax Water's Corbalis plant with Lake Manassas water treated by the City of Manassas, and lists chlorine as its disinfectant. Customers in Bull Run Mountain and Evergreen are on public groundwater wells instead. Which system serves a given 20169 address varies, and some outlying parts of the Haymarket postal area may rely on private wells or onsite wastewater systems, so check the bill. Main breaks and outages go to Emergency Dispatch at (703) 335-7990; Customer Service is (703) 335-7950. Prince William Water says the lines it owns are non-lead; lines on private property belong to the owner.
What should staff do about a gas smell?
Haymarket is Columbia Gas of Virginia territory. Get everyone outside first, then call 911 and Columbia Gas at 1-800-544-5606. The Town lists the same number for gas leaks. After the utility makes the line safe, a plumber can find and repair leaks on the building side and relight appliances.
Local note
Haymarket's 1880s core at the base of the Bull Run Mountains is surrounded by newer growth, and the median home was built in 1997. That mix means a commercial call might involve an old building's drains one day and a newer center's backflow test the next. Prince William Water's cross-connection program calls for testable backflow devices to be tested at installation or repair and every year after, so keep test records with your building files.
Commercial Plumbing questions in Haymarket
What should employees do if they notice a gas odor?
Does a local mailing address mean the town or the county handles our permits?
What if the property has a well or isn't on public sewer?
Can the work happen at night or on a weekend so we stay open?
More plumbing services in Haymarket
Commercial Plumbing nearby
Helpful guides
Sources
- Town of Haymarket: utility contact information
- Town of Haymarket: building and zoning permits
- Town of Haymarket: building department transfer
- Prince William Water annual water quality report
- Prince William Water: contact us
- Prince William Water: backflow prevention and cross-connection control
- Prince William County: gas-fired tankless water heater permit guide
- Columbia Gas of Virginia
- Haymarket housing by year built
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